Complete Guide to Nigerian Tax Filing for Small Businesses (2026)

Overview: What Taxes Nigerian SMEs Owe

Nigerian small businesses face multiple tax obligations across federal and state levels. Most business owners know about VAT and PAYE — but there are several levies that catch small businesses off-guard, especially as they grow past the ₦25 million annual revenue threshold.

Here's the complete picture of what a typical incorporated Nigerian SME with employees needs to file:

Tax	Rate	Threshold	Filing Frequency	Authority
Value Added Tax (VAT)	7.5%	Annual turnover ≥ ₦25M	Monthly	FIRS
Company Income Tax (CIT)	0% / 20% / 30%	All incorporated companies	Annual	FIRS
PAYE (Personal Income Tax)	7%–24% graduated	All employers with paid staff	Monthly + annual	State IRS
Withholding Tax (WHT)	5%–10%	On specified payments	Monthly	FIRS / State IRS
Education Tax	2% of assessable profit	All companies with assessable profits	Annual (with CIT)	TETFUND / FIRS
Police Trust Fund Levy	0.005% of net profit	All companies	Annual (with CIT)	FIRS
NSITF Contribution	1% of employee monthly basic salary	All employers	Monthly	NSITF

The key distinction: VAT, PAYE, and WHT are monthly obligations — you owe them whether or not your business turned a profit. CIT and Education Tax are annual, and they depend on profitability. The levies (Police Trust Fund, NSITF) are often overlooked by smaller businesses and are increasingly being assessed in routine FIRS reviews.

FIRS Registration and TIN Requirements

Before you file anything, your business needs to be registered with FIRS and have a Tax Identification Number (TIN). This is the foundation — every other filing is linked to this TIN.

Who needs to register with FIRS?

• All companies incorporated with the Corporate Affairs Commission (CAC)
• All businesses with annual turnover of ₦25 million or above (VAT registration)
• Any business that employs staff (for PAYE, you also register with your State Internal Revenue Service)
• Businesses making payments subject to withholding tax

In practice, almost every legitimate Nigerian SME should be registered. If your business is incorporated but has no TIN, you're technically in violation from day one of operation.

How to get a TIN

The fastest route is through the FIRS TIN portal (tin.jtb.gov.ng). For incorporated companies:

1. Log into the JTB TIN portal with your CAC registration number
2. Complete the company profile (registered address, business type, directors)
3. Upload CAC Certificate of Incorporation and Memorandum of Association
4. Submit — TIN is typically issued within 24–48 hours electronically

Once you have a TIN, use it to register on the FIRS TaxPro-Max portal, which is now the mandatory filing platform for all federal taxes (VAT, CIT, Education Tax, WHT).

VAT registration specifically

VAT registration is a separate step from your TIN. If your business has annual taxable supplies of ₦25 million or above, you must register for VAT. Once registered, you're required to charge VAT at 7.5% on applicable goods and services, file monthly VAT returns, and remit the net amount (output VAT minus input VAT) to FIRS.

VAT Filing: Monthly Returns, Deadlines, and Penalties

VAT is the tax that trips up most Nigerian SMEs. The mechanics are straightforward — but the deadlines are unforgiving and the penalties compound quickly.

How Nigerian VAT works

VAT is a consumption tax on the value added at each stage of production. As a business, you collect VAT from your customers (output VAT) and pay VAT on your business purchases (input VAT). You remit the difference to FIRS.

• Output VAT = VAT collected from customers on your sales
• Input VAT = VAT you paid on qualifying business purchases
• Net VAT payable = Output VAT − Input VAT

Use our free VAT Calculator to compute your monthly net VAT position in seconds.

What is subject to VAT?

Most goods and services in Nigeria are VATable at 7.5%. Key exemptions include:

• Basic food items (unprocessed/unpackaged agricultural produce)
• Pharmaceutical products and medical supplies
• Educational materials (books, educational fees)
• Baby products
• Exported goods and services (zero-rated)
• Financial services (banking, insurance products)

If you're unsure whether your product or service is VATable, the default is: assume it is, and verify with FIRS or a tax consultant.

VAT filing deadlines and process

Step	What to do	Deadline	Platform
1. Prepare VAT Return	Summarise all VAT-able sales and purchases for the month	By 21st of following month	Your accounting records
2. File on TaxPro-Max	Log into FIRS TaxPro-Max, complete the VAT Form 002	By 21st of following month	TaxPro-Max portal
3. Make payment	Transfer net VAT due to FIRS via REMITA or bank	Same day as filing (21st)	REMITA / designated banks
4. File nil return	If no VATable transactions: still file ₦0 return	By 21st of following month	TaxPro-Max portal

Common VAT mistakes to avoid

• Not keeping VAT invoices. You can only claim input VAT if you have a valid VAT invoice from your supplier. No invoice = no deduction.
• Treating exports as VATable. Exports are zero-rated, not exempt. Zero-rated still lets you claim input VAT refunds; exempt does not. If you export, understand the difference.
• Filing on time but not paying. A filed-but-unpaid return still triggers the 5% surcharge on the outstanding amount. Filing and paying are two separate steps.
• Forgetting nil returns. Even a month with zero VATable activity requires a nil return. Skipping it counts as non-filing.

PAYE Filing: Monthly Remittance and Annual Returns

Pay-As-You-Earn (PAYE) is personal income tax deducted from employee salaries and remitted by the employer to the relevant State Internal Revenue Service (SIRS). As an employer, you're the tax collector — and FIRS treats failure to deduct and remit as your liability, not your employee's.

The PAYE tax bands (2026)

Nigeria uses a progressive rate structure based on taxable annual income after the Consolidated Relief Allowance (CRA):

Annual Taxable Income (after CRA)	Rate
First ₦300,000	7%
Next ₦300,000 (₦300,001–₦600,000)	11%
Next ₦500,000 (₦600,001–₦1,100,000)	15%
Next ₦500,000 (₦1,100,001–₦1,600,000)	19%
Next ₦1,600,000 (₦1,600,001–₦3,200,000)	21%
Above ₦3,200,000	24%

The Consolidated Relief Allowance (CRA)

Before applying these bands, every employee gets a CRA deduction: the higher of ₦200,000 or 1% of gross income, plus 20% of gross income. This significantly reduces the taxable base for most employees.

Example: An employee earning ₦1.5M annually gets a CRA of approximately ₦500,000 (₦200K + 20% of ₦1.5M = ₦500K). Taxable income = ₦1,000,000. Use our free PAYE Payroll Calculator to compute this automatically for any salary.

Monthly PAYE filing process

1. Calculate each employee's monthly PAYE liability (annual PAYE ÷ 12)
2. Deduct PAYE from employee's net pay
3. Remit total PAYE collected to the State IRS (Lagos LIRS, Abuja FCT-IRS, Rivers RIRS, etc.) by the 10th of the following month
4. File the corresponding monthly schedule with your State IRS

Annual PAYE returns: Form H1

In addition to monthly remittances, employers must file the Annual PAYE Return (Form H1) by 31st January each year. This form lists every employee, their gross income, total PAYE deducted for the year, and the remittance schedule. Missing the Form H1 deadline carries penalties of ₦500,000 for companies (or ₦50,000 for individuals).

Company Income Tax (CIT): Annual Returns and Provisional Tax

Company Income Tax is paid on a company's assessable profits — revenue minus allowable deductions. Unlike VAT and PAYE which are monthly, CIT is an annual obligation filed after your accounting year ends.

CIT rates (2026)

Company Size (Annual Turnover)	CIT Rate
Small company (below ₦25 million)	0% — exempt from CIT
Medium company (₦25M – ₦100M)	20% of assessable profit
Large company (above ₦100M)	30% of assessable profit

CIT filing timeline

Nigerian companies file CIT returns within 6 months after the end of the accounting year. For most companies with a December year-end, that's 30 June.

Self-assessment and provisional tax

Nigeria uses a self-assessment system — you compute your own tax liability and pay it without waiting for FIRS to raise an assessment. The process:

1. Prepare financial statements for the accounting year
2. Compute assessable profit: gross profit minus allowable deductions (capital allowances, business expenses, losses carried forward)
3. Calculate CIT and Education Tax due
4. File on TaxPro-Max using the self-assessment form
5. Pay via REMITA on the same date

If you cannot finalise your financial statements within 6 months, you can pay provisional CIT based on estimated profits — then file the audited return when ready and pay any balance (or claim a refund). Late payment carries a 10% penalty on unpaid tax plus interest.

Capital allowances: the CIT deduction most SMEs miss

Capital allowances replace depreciation for tax purposes. Equipment, vehicles, computers, and similar assets purchased for business use qualify for Initial Allowance (25–95% in year 1, depending on asset class) and Annual Allowance in subsequent years. Many Nigerian SMEs pay more CIT than they owe because they don't claim capital allowances properly. Track every business asset purchase — it's a legitimate deduction.

Withholding Tax: Rates by Payment Type

Withholding Tax (WHT) is deducted at source by the payer and remitted to FIRS. When you pay a supplier, consultant, landlord, or service provider, you are required by law to withhold a portion of that payment and send it directly to FIRS. Your payee then credits this against their own tax bill.

The key point most SMEs miss: if you fail to withhold, the penalty falls on you — not the recipient. FIRS treats the payer as responsible for collection.

Payment Type	WHT Rate (Corporate Payee)	WHT Rate (Individual Payee)
Consulting / professional fees	10%	5%
Rent (immovable property)	10%	10%
Dividends	10%	10%
Interest (loans, deposits)	10%	10%
Royalties	10%	5%
Construction / engineering contracts	5%	5%
Agency / commission	5%	5%
Management fees	10%	5%
Hiring / leasing	10%	5%
Supply of goods (above ₦5,000 per contract)	5%	5%

WHT filing: monthly by 21st

WHT collected during a month must be remitted to FIRS by the 21st of the following month — the same deadline as VAT. Late remittance: 5% per annum on unpaid WHT plus interest. Keep a WHT register tracking every deduction made, from whom, for what, and the date remitted. This register is what FIRS asks for in an audit.

Common Mistakes That Trigger FIRS Audits

FIRS uses risk-based assessment to select audit targets. Understanding what they look for helps you avoid unnecessary scrutiny — and ensures that if you are audited, your records hold up.

1. Revenue reported to FIRS doesn't match CAC filings

Your annual returns to CAC include financial statements. If the revenue figure there doesn't match what you reported to FIRS for CIT, that's an automatic flag. These databases are increasingly cross-referenced.

2. VAT output much lower than industry averages

FIRS maintains sector benchmarks. If your gross margin or VAT-to-revenue ratio is significantly below the industry average for your sector, you'll attract a desk review.

3. Significant unexplained differences between bank deposits and declared revenue

FIRS can and does request bank statements during audits. If ₦30M hit your business account and you declared ₦18M in revenue, you need a clean explanation for every naira of that gap (loans received, refunds, non-business receipts, etc.).

4. No WHT deductions on payments to service providers

A company that pays consultants, lawyers, or contractors without any WHT deductions stands out. FIRS auditors check payment records against WHT remittances. Zero WHT on regular service payments is a red flag.

5. Claiming input VAT without invoices

Input VAT deductions with no corresponding valid VAT invoices are disallowed in full — and the disallowance becomes additional output VAT owed, plus penalties. Every input VAT claim needs a physical or digital invoice with the supplier's TIN and VAT registration number.

6. Late or missing filings across multiple tax types

A business that consistently files VAT late, misses PAYE remittances, and hasn't filed a CIT return in two years is a priority target. Enforcement FIRS is focusing on is the "quiet non-filer" — companies that are registered, clearly operational, but aren't filing.

7. Paying yourself without PAYE records

If you're a director taking a salary or management fees, that should appear in your payroll records with PAYE applied. Directors who receive regular transfers from the company account but have no corresponding payroll or WHT trail attract scrutiny during payroll audits.

Record-Keeping Requirements (6-Year Minimum)

Nigerian tax law requires businesses to keep financial records for a minimum of 6 years from the end of the accounting period. FIRS can request records going back 6 years in any audit or investigation. Beyond the legal requirement, good record-keeping is simply how you survive an audit without a penalty.

What records to keep

Record Type	What It Covers	Retention
Sales invoices	All invoices issued to customers, with VAT amount shown separately	6 years minimum
Purchase invoices / receipts	All receipts and invoices from suppliers (especially for input VAT claims)	6 years minimum
Bank statements	All business bank account statements, all months	6 years minimum
Payroll records	Employee contracts, monthly payslips, PAYE calculation sheets, Form H1 filings	6 years minimum
WHT register	Every WHT deduction: date, payee, payment amount, WHT rate, WHT deducted, remittance reference	6 years minimum
VAT returns and payment receipts	Copies of all filed VAT Form 002 returns and REMITA payment receipts	6 years minimum
CIT returns and audited accounts	Annual CIT self-assessment filings, audited financial statements	6 years minimum
Asset register	All business assets, purchase price, date acquired, depreciation/capital allowance claimed	Life of asset + 6 years
Contracts and agreements	Service agreements with suppliers, customer contracts, lease agreements	6 years from contract end

Digital vs. physical records

FIRS accepts digital records — scanned invoices, electronic bank exports, and accounting software exports are all valid. The practical implication: a properly configured bookkeeping system is effectively your FIRS-ready archive. If every transaction is categorised, has a digital receipt attached, and your VAT/PAYE returns are saved, you're audit-ready at all times.

What doesn't work: a WhatsApp group of invoice photos, a physical folder that gets lost, or a spreadsheet that no one can reconcile. The record needs to be complete, retrievable, and traceable to a bank transaction.

Free Tax Tools for Nigerian SMEs

Tax calculations don't have to be done by hand. These tools handle the most common computations — free, no account needed.

When to Hire a Tax Consultant vs. Use Software

This is the question most Nigerian SME owners get wrong — they stay in "do it myself" mode too long, then panic and hire a consultant when something breaks. Here's a clearer framework:

Situation	Best approach
Monthly VAT and PAYE filing, under ₦100M turnover	Software handles this
Annual CIT return with straightforward P&L	Software + self-assessment
You received a FIRS query or audit notice	Tax consultant — immediately
Multiple tax types and you're not sure what applies	One-time consultant review, then software
Restructuring, dividends, related-party transactions	Tax consultant required
Annual turnover above ₦500M	Full-time tax professional
International transactions, transfer pricing	Specialist tax counsel
Monthly bookkeeping, categorisation, cash flow tracking	Software is cheaper and more accurate

The pattern for most Nigerian SMEs with turnover between ₦25M and ₦500M: software for the monthly routine (VAT, PAYE calculations, WHT tracking, bookkeeping), and a tax consultant for the annual CIT return and any FIRS correspondence. A good accountant reviewing a well-kept set of books takes hours, not weeks. A consultant untangling two years of missing records bills for both the work and the stress.

How Trezra fits

Trezra automates the bookkeeping layer — every bank transaction categorised automatically, VAT tracked in real time, and weekly cash flow reports generated without manual input. That's the part that currently consumes 8+ hours a month for most Nigerian SME owners. When it's time to file, your records are already clean, your VAT position is current, and your accountant has structured data instead of a shoebox of receipts.

The ₦8,000–₦15,000 per month you save in bookkeeper fees typically exceeds the cost of the software. And the FIRS penalty you avoid by filing on time — with correct numbers — pays for years of subscription. Read how we compare to keeping a manual spreadsheet: Trezra vs Spreadsheets. Or read our broader guide: The Complete Guide to Small Business Bookkeeping in Nigeria.

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